Influence of Kinship and MHC Class II Genotype on Visual Traits in Zebrafish Larvae (Danio rerio)
Influence of Kinship and MHC Class II Genotype on Visual Traits in Zebrafish Larvae (Danio rerio)
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DOI：
10.1371/journal.pone.0051182
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发表时间：
2012-12-10
期刊：
影响因子：
3.7
通讯作者：
Gerlach, Gabriele
中科院分区：
文献类型：
--
作者：
Hinz, Cornelia;Gebhardt, Katharina;Gerlach, Gabriele
亲属识别可以驱动亲属选择和社会行为的进化。在斑马鱼（Danio rerio, Hamilton 1822）中，亲属识别是基于嗅觉和视觉印迹过程。如果幼虫在受精后的第5天和第6天接触到亲属的视觉和化学线索，它们将在一生中识别亲属，而接触到非亲属则无法触发任何识别。化学印迹信号由主要组织相容性复合体（MHC）编码的多态性基因转录；然而，视觉印记的潜在机制仍不清楚。在这里，我们为6日龄斑马鱼幼虫的形态和色素沉着模式存在家族特异性差异提供了证据。臀部、尾巴和身体色素沉着依赖于亲缘关系，虹膜色素沉着和形态测定也受MHC II类基因型的影响。我们的研究表明，MHC不仅影响个体的化学特征，还影响他们的视觉外观。
Kin recognition can drive kin selection and the evolution of social behaviour. In zebrafish (Danio rerio, Hamilton 1822), kin recognition is based on olfactory and visual imprinting processes. If larvae are exposed to visual and chemical cues of kin at day 5 and 6 post fertilization they will recognize kin throughout life, while exposure to non-kin fails to trigger any recognition. Chemical imprinting signals are transcribed by polymorphic genes of the major histocompatibility complex (MHC) code; however, the underlying mechanism for visual imprinting remains unclear. Here we provide evidence for the existence of family-specific differences in morphometry and pigmentation pattern of six day old zebrafish larvae. While rump, tail and body pigmentation were dependent on relatedness, iris pigmentation and morphometry were also influenced by MHC class II genotype. Our study revealed that the MHC not only influences the chemical signature of individuals, but also their visual appearance.